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Originally Posted by AntonioLao by the equivalence of mass and energy  , since a photon is pure energy, gravity also affects energy. |
so we can say that a photon acts like it has a small amount of mass? I believe the energy of a photon is given by it's wavelength times the planck constant. If photons act like they have a small amount of mass than why do we differentiate? Just call a cat a cat if you know what I mean?